/*
 * Copyright 2002-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.security.config.doc;

import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import java.io.InputStream;

/**
 * @author Josh Cummings
 */
public class XmlParser implements AutoCloseable {
	private InputStream xml;

	public XmlParser(InputStream xml) {
		this.xml = xml;
	}

	public XmlNode parse() {
		try {
			DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
			DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();

			return new XmlNode(dBuilder.parse(this.xml));
		} catch ( IOException | ParserConfigurationException | SAXException e ) {
			throw new IllegalStateException(e);
		}
	}

	@Override
	public void close() throws IOException {
		this.xml.close();
	}
}
